Character mistake: After Cal goes to the secret lab in Georgia, he and two others go into his new lab. When they enter a cat jumps up on the counter. Dr. Adams says "This is Neutron. We named him that because he's so positive." Neutrons are neutral and electrons are negative. It's protons that are positive. They should have named the cat Proton.

After Cal goes to the secret lab in Georgia, he and two others go into his new lab. When they enter a cat jumps up on the counter. Dr. Adams says "This is Neutron. We named him that because he's so positive." Neutrons are neutral and electrons are negative. It's protons that are positive. They should have named the cat Proton.

In the shot where scientist Cal Meacham is pulling the power plug from the Interocitor, the post supporting the triangular viewscreen is suddenly taller than in it is in any other scene. It appears to have been lengthened deliberately for this shot in order to raise the viewscreen above the top of the film frame.